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NCT00105222 · ClinicalTrials.gov registry record · Phase 1
Effect of Nitrite on Exercise Physiology and Metabolism
A Phase 1 study, sponsored by National Heart, Lung, and Blood Institute (NHLBI).
- Terminated
- Registry status
- Phase 1
- Development phase
- 15
- Enrollment target
NCT00105222: Clinical Trial Phase 1 study, sponsored by National Heart, Lung, and Blood Institute (NHLBI).
NCT00105222 is a Phase 1 study that was terminated before completion, run by National Heart, Lung, and Blood Institute (NHLBI). The registered enrollment target is 15 participants, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (75% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00105222, a Phase 1 study, was terminated before completion, sponsored by National Heart, Lung, and Blood Institute (NHLBI).
- TERMINATED
- Registry status
- Phase 1
- Development phase
- 15 participants
- Enrollment target
Study Summary
This study will examine how nitrite infusions affect exercise tolerance (how much a person can exercise before having to stop). Exercise ability is limited by how fast oxygen can be delivered to the body and how fast the body can produce energy. Both of these processes are affected by nitric oxide (NO), a gas produced by cells that line blood vessels. NO is important in regulating blood vessel dilation, and consequently, blood flow. Nitrite may act as a storehouse for nitric oxide and be able to improve exercise tolerance. Healthy normal volunteers between 21 and 45 years of age who can use an exercise bicycle may be eligible for this study. Candidates are screened with a medical history, physical examination, electrocardiogram, breathing tests, blood tests, and a pregnancy test for women who are able to bear children. Pregnant women are excluded from the study. The screening session includes practice exercise on the bicycle. Participants exercise on a stationery exercise bicycle for about 30 minutes on each of two study days. During the test, they breathe in and out of a mouthpiece that allows inhaled and exhaled respiratory gases to be measured. Before subjects begin to exercise, a small tube is placed in the artery of their forearm inside the elbow. A longer tube called a central line is placed in a deeper vein in the neck after the area has been numbed. A thinner tube, called a pulmonary artery catheter, is placed through the central line and advanced into the chambers of the heart, through the heart valve, and into the lung artery. This catheter measures various pressures directly in the heart and lungs. Blood samples are drawn through the catheter also, to avoid the need for multiple needle sticks. Another tube is placed in the vein of the other arm to deliver medications. Thirty minutes after all the tubes are placed, a blood sample is drawn for baseline measurements. Then, either saline (sterile salt water) or nitrite is injected into the tube in the arm
Interventions
- DRUG Sodium Nitrite
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 15 participants |
| Start Date | 2005-03-08 |
| Est. Completion | 2013-08-16 |
| Phase | Phase 1 |
Why NCT00105222 stopped before completion
NCT00105222 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 15 participants, a relatively small participant target, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (75% lower).
The record links to 0 conditions, and to 1 intervention - of which Sodium Nitrite is the first listed.
NCT00105222 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00105222 about?
NCT00105222 is a clinical study titled "Effect of Nitrite on Exercise Physiology and Metabolism". This study will examine how nitrite infusions affect exercise tolerance (how much a person can exercise before having to stop). Exercise ability is limited by how fast oxygen can be delivered to the body and how fast the body can produce energy. Both of these processes are affected by nitric oxide (...
What is the current status of trial NCT00105222?
This trial is currently terminated. It is a Phase 1 study. The enrollment target is 15 participants. The study started on 2005-03-08. Estimated completion is 2013-08-16.
What interventions are being tested in trial NCT00105222?
The interventions under investigation include: Sodium Nitrite (DRUG).
Who is sponsoring clinical trial NCT00105222?
This trial is sponsored by National Heart, Lung, and Blood Institute (NHLBI), which has 501 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00105222's enrollment target sits among peer trials
15 1798th of 2000 higher than 157 of 2,000 other Phase 1 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 1 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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